A teenage boy lured a 12-year-old girl into his house under the guise of getting parts for her treasured bicycle then, with his older brother, killed her, police said.

The girl's disappearance had sparked a frantic search by residents of the small New Jersey town of Clayton until a tip from the boys' mother led police to her body, stuffed into a home recycling bin.

The boys, aged 15 and 17, were charged with murdering Autumn Pasquale, who disappeared while riding her BMX bike on Saturday, a little more than a week before what would have been her 13th birthday. She appeared to have been strangled, Gloucester County prosecutor Sean Dalton said.

The boys' mother had come forward with information about a posting on a son's Facebook account, Mr Dalton said. He would not say what was on the website or discuss a possible motive for the killing, but said there was no sign of sexual assault.

Autumn was lured to the house, where they apparently lived with their mother and stepfather, for the purpose of getting parts for her treasured BMX bike, which she rode frequently and talked about on her Facebook pages.

Both brothers were charged with counts including first-degree murder, body disposal and tampering with evidence. The 15-year-old was also charged with luring.

The boys' names were not released because they are juveniles, but Mr Dalton said his office was considering trying to have the case transferred to adult court.

The boys turned themselves in with their lawyers, but it could not be immediately determined who they are.

The girl's body was found at around 10pm on Monday in a recycling bin on a vacant property next to the home where the boys live, police said. The suspects had attended a community vigil for her shortly before the discovery, several residents said.

Autumn's BMX bike and other belongings were recovered from the boys' home, the prosecutor said. He did not detail all the items, but a backpack matching a description of the girl's was also seen being taken out.